Douglas Scott Kay, Donald P. Greenberg. Transparency for computer synthesized images. In Thomas A. DeFanti, Bruce H. McCormick, Bary W. Pollack, Norman I. Badler, S. H. Chasen, editors, Proceedings of the 6th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 1979, Chicago, Illinois, USA, August 8-10, 1979. pages 158-164, ACM, 1979. [doi]
Abstract is missing.